Here’s another way to think about the number line model for 2 – (-3): if we were adding 2 + (-3), we’d first move two units to the right. Then, we’d move three units to the left, because we move left when adding negative integers. But instead, we’re subtracting -3. Addition and subtraction are inverse operations, or opposite operations; they undo one another. So we move in the opposite direction, right, and end up with a sum of 5. As a result, the number line models for 2 – (-3) and 2 + 3 are identical. This shows that subtracting a negative integer is the same as adding a positive integer.

Subtracting -9 from any number is the same as

A
subtracting 9 from that number.
B
subtracting 0 from that number.
C
adding 9 to that number.
D
adding -3 to that number.

Subtracting -9 from any number is the same as

A

subtracting 9 from that number.

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v